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Influence of 60-Hz magnetic fields on sea urchin development

✍ Scribed by Dr. Selma Zimmerman; Arthur M. Zimmerman; Wendell D. Winters; Ivan L. Cameron

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
532 KB
Volume
11
Category
Article
ISSN
0197-8462

No coin nor oath required. For personal study only.

✦ Synopsis

Continuous exposure of sea urchin (SrronR?i/ocmtrcrfus purpurutus) embryos at 18Β°C to a cyclic 60-Hz magnetic field at 0. I mT rms beginning 4 min after insemination caused a significant developmental delay during the subsequent 23 hours. No delay in development was recorded for periods up to 18 hours after fertilization. At 18 h, most embryos were in the mesenchyme blastula stage. At 23 h, most control embryos were in mid-gastrula whereas most magnetic-field-exposed embryos were in the early gastrula stage. Thus an estimated I -h delay occurred between these developmental stages. The results are discussed in terms of possible magnetic-field modification of transcription as well as interference with cell migration during gastrulation. The present study extends and supports the growing body of information about potential effects of exposures to extremely-low-frequency (ELF) magnetic fields on developing organisms.

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